Samsung Oven Error Code C-31 — Overheated PCB (Control Board)
What this means
The C-31 error code indicates the electronic control board's temperature sensor has detected excessive heat on the board itself. This is not about the oven cavity temperature — it is the circuit board overheating. This can occur during extended self-clean cycles, when the oven is installed without proper ventilation clearance, or when cooling fans for the electronics are not working.
Alternate codes: C31
Step-by-step fix
4 stepsLet the oven cool completely
Turn off the oven and let it cool for at least 1 hour. Do not open the oven door during self-clean — it should cool down on its own.
The C-31 error during self-clean may resolve after cooling, as the self-clean cycle generates extreme heat.
Check installation clearances
Ensure the oven has proper ventilation clearances on all sides as specified in the installation guide. Built-in ovens and slide-in ranges need adequate airflow around the unit.
Insufficient clearance causes heat to build up around the electronics.
Check the cooling fan
Some Samsung ovens have a cooling fan that runs to cool the electronics during and after cooking. Listen for the fan when the oven is operating. If the fan does not run, it may need replacement.
The cooling fan often continues running after the oven is turned off — this is normal.
Try running the oven at a lower temperature
After cooling, try running the oven at a normal bake temperature (350°F). If the error only occurs during self-clean, it may be an installation issue. If it occurs at normal temperatures, the board or fan is likely faulty.
Self-clean cycles reach 800-900°F and put maximum stress on the electronics.
When to call a professional
If the cooling fan is not working or the error occurs at normal baking temperatures, a technician should inspect the cooling system and control board.
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Electronic Control Board
Part #DG92-01129C · $100–$250
If board is damaged from overheating
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